func ListAllInstances() (instances []string, err error) {
instances, _, err = Zk.VisibleChildren(helper.GetBaseInstanceDataPath())
if err != nil {
log.Printf("Error getting list of all instances. Error: %s.", err.Error())
}
if instances == nil {
log.Println("No instances found. Returning empty list.")
instances = []string{}
}
return
}
func GetInstance(id string) (zi *ZkInstance, err error) {
zi = &ZkInstance{}
err = getJson(helper.GetBaseInstanceDataPath(id), zi)
if err != nil {
/* NOTE(edanaher): The default error message here is typically from zookeeper, which is not very user
* friendly. And at Ooyala, we've had a number of users run into this because they're looking at the wrong
* region. So as long as that is the dominant source of this error, it makes sense to suggest this as the
* cause, much like compilers will attempt to guess at missing semicolons. */
err = errors.New(err.Error() + "\nContainer " + id + " not found; is this the right region?")
}
return
}
func CreateInstancePaths() {
Zk.Touch(helper.GetBaseInstancePath())
Zk.Touch(helper.GetBaseInstanceDataPath())
}
func InstanceExists(id string) bool {
if stat, err := Zk.Exists(helper.GetBaseInstanceDataPath(id)); err == nil && stat != nil {
return true
}
return false
}
func (zi *ZkInstance) dataPath() string {
return helper.GetBaseInstanceDataPath(zi.ID)
}